Sorry if the resident Pier member is here but, I find Pier a little over expensive with a big but....... They do have a huge selection of fish, especially plecos that tend to be harder to find, bargains are there.
On the Pier/BAS front, personally I hate driving unless it's on a motorway, both are a pain to get to even though they are are less than 15 miles away from me, given the option I'd go to BAS just because they have more tanks and more to look at, if your going to Pier go to BAS too, make up your own mind